公开(公告)号：US08450012B2

公开(公告)日：2013-05-28

申请号：US12787138

申请日：2010-05-25

申请人： Yi Cui ,  Song Han ,  Ghyrn E. Loveness

发明人： Yi Cui ,  Song Han ,  Ghyrn E. Loveness

IPC分类号： H01M5/58 ,  H01M4/90 ,  H01M4/583

CPC分类号： H01M4/70 ,  B82Y30/00 ,  B82Y40/00 ,  H01M4/04 ,  H01M4/0402 ,  H01M4/043 ,  H01M4/0438 ,  H01M4/0471 ,  H01M4/049 ,  H01M4/0492 ,  H01M4/133 ,  H01M4/134 ,  H01M4/38 ,  H01M4/386 ,  H01M4/387 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/022 ,  H01M2004/027 ,  Y02E60/122

摘要： Provided are electrode layers for use in rechargeable batteries, such as lithium ion batteries, and related fabrication techniques. These electrode layers have interconnected hollow nanostructures that contain high capacity electrochemically active materials, such as silicon, tin, and germanium. In certain embodiments, a fabrication technique involves forming a nanoscale coating around multiple template structures and at least partially removing and/or shrinking these structures to form hollow cavities. These cavities provide space for the active materials of the nanostructures to swell into during battery cycling. This design helps to reduce the risk of pulverization and to maintain electrical contacts among the nanostructures. It also provides a very high surface area available ionic communication with the electrolyte. The nanostructures have nanoscale shells but may be substantially larger in other dimensions. Nanostructures can be interconnected during forming the nanoscale coating, when the coating formed around two nearby template structures overlap.

摘要翻译： 提供了用于可再充电电池的电极层，例如锂离子电池以及相关制造技术。 这些电极层具有互连的中空纳米结构，其包含高容量的电化学活性材料，例如硅，锡和锗。 在某些实施例中，制造技术包括围绕多个模板结构形成纳米级涂层，并且至少部分地去除和/或收缩这些结构以形成中空腔。 这些空穴为纳米结构的活性材料在电池循环过程中提供空间。 该设计有助于降低粉碎的风险并保持纳米结构之间的电接触。 它还提供了与电解质的非常高的表面积可用的离子连通。 纳米结构具有纳米尺寸的壳，但在其它尺寸上可能显着更大。 当形成纳米尺度涂层时，当围绕两个附近的模板结构形成的涂层重叠时，纳米结构可以相互连接。